I don't know whether it will be of any help at this point but trying eco reef rock (the guy is from halifax) might be worth a shot. You will be directly dealing with the guy who will be sending you the rocks so you can specifically ask for proper pieces. Those are man made ocean cured rocks and I started with them. Half the rock in my tank is from there.
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You wouldn't want to see my tank. I don't use fancy equipment and I am a noob 
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